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LP2950 데이터시트(HTML) 6 Page - Texas Instruments

부품명 LP2950
상세내용  ADJUSTABLE MICROPOWER VOLTAGE REGULATORS WITH SHUTDOWN
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LP2950 데이터시트(HTML) 6 Page - Texas Instruments

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LP2950
,, LP2951
ADJUSTABLE MICROPOWER VOLTAGE REGULATORS
WITH SHUTDOWN
SLVS582D – APRIL 2006 – REVISED MARCH 2007
Electrical Characteristics (continued)
V
IN = VOUT (nominal) + 1 V, IL = 100 µA, CL = 1 µF (5-V versions) or CL = 2.2 µF (3-V and 3.3-V versions),
8-pin version: FEEDBACK tied to V
TAP, OUTPUT tied to SENSE, VSHUTDOWN ≤ 0.7 V
PARAMETER
TEST CONDITIONS
TJ
MIN
TYP
MAX
UNIT
25
°C
20
40
FEEDBACK bias current
nA
–40
°C to 125°C
60
FEEDBACK bias current
25
°C
0.1
nA/
°C
temperature coefficient
ERROR COMPARATOR
25
°C
0.01
1
Output leakage current
VOUT = 30 V
µA
–40
°C to 125°C
2
25
°C
150
250
VIN = VOUT(NOM) – 0.5 V,
Output low voltage
mV
IOL = 400 µA
–40
°C to 125°C
400
25
°C
40
60
Upper threshold voltage
mV
(ERROR output high)(5)
–40
°C to 125°C
25
25
°C
75
95
Lower threshold voltage
mV
(ERROR output low)(5)
–40
°C to 125°C
140
Hysteresis(6)
25
°C
15
mV
SHUTDOWN INPUT
Low (regulator ON)
0.7
Input logic voltage
–40
°C to 125°C
V
High (regulator OFF)
2
25
°C
30
50
VTAP = 2.4 V
–40
°C to 125°C
100
SHUTDOWN input current
µA
25
°C
450
600
VTAP = 30 V
–40
°C to 125°C
750
VSHUTDOWN ≥ 2 V,
25
°C
3
10
Regulator output current
VIN ≤ 30 V, VOUT = 0,
µA
in shutdown
–40
°C to 125°C
20
FEEDBACK tied to VTAP
(5)
Comparator thresholds are expressed in terms of a voltage differential equal to the nominal reference voltage (measured at
VIN – VOUT = 1 V) minus FEEDBACK terminal voltage. To express these thresholds in terms of output voltage change, multiply by the
error amplifier gain = VOUT/VREF = (R1 + R2)/R2. For example, at a programmed output voltage of 5 V, the ERROR output is specified to
go low when the output drops by 95 mV
× 5 V/1.235 V = 384 mV. Thresholds remain constant as a percentage of V
OUT (as VOUT is
varied), with the low-output warning occurring at 6% below nominal (typ) and 7.7% (max).
(6)
Comparator thresholds are expressed in terms of a voltage differential equal to the nominal reference voltage (measured at
VIN – VOUT = 1 V) minus FEEDBACK terminal voltage. To express these thresholds in terms of output voltage change, multiply by the
error amplifier gain = VOUT/VREF = (R1 + R2)/R2. For example, at a programmed output voltage of 5 V, the ERROR output is specified to
go low when the output drops by 95 mV
× 5 V/1.235 V = 384 mV. Thresholds remain constant as a percentage of V
OUT (as VOUT is
varied), with the low-output warning occurring at 6% below nominal (typ) and 7.7% (max).
6
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